Wired Communication Faults - Pepperl+Fuchs WHA-ADP Series Manual

WHA-ADP-*
Troubleshooting
8.3

Wired Communication Faults

Fault
PACTware
cannot find the
adapter when
communicating
via a HART
modem.
A field device
powered by the
adapter will not
start up
The parameters
of a field device
powered by the
adapter cannot
be read by the
adapter DTM
(Wired
Commuinicatio
n Dialog, see
chapter 5.5)
Possible cause
HART communication DTM not
connected to correct COM port
HART modem plugged into wrong
USB port (some computers
assign fixed COM ports to USB
ports). Maybe you are using a
different USB port than during
setup.
Adapter address not found by the
HART communication DTM
For USB/HART modems, voltage
level at Terminals 7 and 8 to high
for reliable communication
Battery not connected or
exhausted
Power supply parameters are
incorrect
Connected field device has a very
low impendance - the adapter
interprets this as a short-circuit
and switches off the power
Device does not support HART
protocol
Device address not found by the
Adapter DTM
Device not powered
Device powered, but shuts down
before it communicates
Corrective action
• Select the correct COM port from
the drop-down menu
• RS-232C = COM1 or COM2,
USB = COMx as displayed
Check to which COM port your
HART modem is connected to (see
chapter 4.3). Then set the correct
COM port in the HART
communication DTM ().
• Plug the HART modem into the
correct USB port.
• Alternatively, adjust the COM
port setting in the HART
communication DTM ().
• Configure the correct address
range ().
• Default adapter address = 15
Switch in the communication
resistor or connect a 250 
resistor across terminals 5/7 and
6/8 (see chapter 3.3.1).
• Check the connection, if
necessary replace the battery.
• A simple check is to shake the
adapter or battery unit - if you
hear liquid, the battery still has
life.
• Find the correct parameters in
the device manual and enter
them into the DTM (see chapter
5.8).
• Connect e.g. a 250  resistor in
series with the device.
• Parameters can be read from a
HART device only.
• Check the highest scan address
(see chapter 5.5).
• See previous fault.
• Increase power supply
parameter "Lead Time" in steps
of 10s until the fault is eliminated
(see chapter 5.8).
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